Meter Illumination is Always Dark [12/2015 - ]: Procedure

1. Check if a CAN communication DTC is output (Refer to DIAGNOSIS SYSTEM [12/2015 - 08/2016] Refer to DIAGNOSIS SYSTEM [08/2016 - 11/2017] Refer to DIAGNOSIS SYSTEM [11/2017 - 08/2018] Refer to DIAGNOSIS SYSTEM [08/2018 - ] ).
   RESULT
   
   

   Result	Proceed to
   CAN communication DTC is not output	A
   CAN communication DTC is output	B

Result: 

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2015 - 08/2016]  Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2016 - 11/2017]  Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2017 - ] 

Result: 

A 

See step  2

1. Check if DTC B1244 is output (Refer to DTC CHECK / CLEAR [12/2015 - ] ).
   RESULT
   
   

   Result	Proceed to
   B1244 is not output	A
   B1244 is output	B

Result: 

B 

GO TO LIGHTING SYSTEM 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2015 - 11/2017] Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2017 - ] )

Result: 

A 

See step  3

1. Turn the ignition switch to ON.
2. Turn the light control switch to the AUTO position.
3. Cover the automatic light control sensor.
4. Check the taillights and low beam headlights.

   OK

   The taillights and low beam headlights come on.

5. Uncover the automatic light control sensor.
6. Check the low beam headlights and taillights.

   OK

   The low beam headlights and taillights go off.

   RESULT
   
   

   Result	Proceed to
   Automatic light control system operates normally	A
   Automatic light control system does not operate normally	B

Result: 

B 

CHECK LIGHTING SETTING 

(Refer to CUSTOMIZE PARAMETERS [12/2015 - 11/2017] Refer to CUSTOMIZE PARAMETERS [11/2017 - ] )

Result: 

A 

See step  4

1. Replace the main body ECU (multiplex network body ECU) with a new or a normal one (Refer to REMOVAL [12/2015 - ] ).

   OK

   The operation of the combination meter assembly returns to normal.

   HINT: 

   The meter CPU controls the meter illumination based on an auto dimmer signal from the main body ECU (multiplex network body ECU). When the meter illumination is always dark (very dim), it may be due to the main body ECU (multiplex network body ECU) sending an auto dimmer signal to the meter CPU because of a malfunction in the main body ECU (multiplex network body ECU).

Result: 

OK 

END (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) WAS DEFECTIVE) 

Result: 

NG 

REPLACE COMBINATION METER ASSEMBLY 

(Refer to REMOVAL [12/2015 - ] )